I did end up make a simple PCB that plugs into a breadboard, but looking back the simple circuit would have worked just as well placed directly on a breadboard. Here’s what you need: If you have ...

and parts you’ve swapped in and out of the circuit. In an attempt to tame this runaway mess, [Raph] came up with this neat modular breadboard system. It hearkens back to the all-in-one ...